Abstract: In order to satisfy the requirement of blast furnace on longevous cooling stave,the temperature and stress field of the newly designed cast iron cooling stave of taphole are calculated by using the ABAQUS. The results show that the maximum temperature of hot surface is 85.22℃ which leads to small deformation at the early stage of taphole opening. When the lining erosion thickness increases from 50 mm to 1 100 mm,the temperature of the hot surface at the taphole corner increases from 87.16℃ to 234.9℃. In addition,the stress at the middle part of the stave increases from 130.3 MPa to 294.0 MPa which is close to the yield strength of the stave,but the stresses at locating pins greatly exceed the yield strength of the stave. The results indicate that the weak cooling area of the newly designed cooling stave is near the taphole corner and central line,and the stress concentrates near the locating pins. This study provides a theoretical basis for improving the design and installation of the cast iron cooling stave of taphole.